can't vs. cannot

cant

noun

  1. insincere, especially conventional expressions of enthusiasm for high ideals, goodness, or piety.

    Synonyms: , , ,

  2. the private language of the underworld.
  3. the phraseology peculiar to a particular class, party, profession, etc.:

    the cant of the fashion industry.

  4. whining or singsong speech, especially of beggars.

verb (used without object)

  1. to talk hypocritically.
  2. to speak in the whining or singsong tone of a beggar; beg.

cannot

verb

  1. a form of can not.